ST. LOUIS (KSDK) -- The Stevens Institute of Business and Arts is opens to students Tuesday morning, one week after a shooting left to critically wounded.

The announcement was made last week, although it's not clear if the school is making any security changes or implementing grief counseling.

St. Louis police say the gun used in a shooting last week at a downtown business college had been stolen in a 2011 burglary in St. Louis County.

34-year-old Sean Johnson is accused of SIBA financial aid director Greg Elsenrath on Tuesday in an argument over financial aid. Police say he then shot himself. Both men survived.

Police said Monday that the Bureau of Alcohol, Firearms, Explosives and Tobacco was able to trace the history of the Kel-Tec 9 gun used in the shooting.

A St. John resident had purchased it at a gun company in St. Ann on March 2, 2011. That gun owner was the victim of a burglary in November 2011. The Kel-Tec 9 was among four weapons stolen in that burglary.